IniParser: write 'func' options with "ini-name"

[cdevienne]

If a 'ini-name' tag is set on the option, write it to file even if the
option is a function.

[jessevdk]

What is the idea behind this?

[cdevienne]

I use the WriteIni function to generate a configuration file skeleton, in which I want to see all options, including some function based ones.
Since that PR I modified my fork so the option is always commented. If meaningful I can update the PR.
A more complete version of this PR would be to somehow store the value that was read from the configuration so a read/write of the configuration file is idempotent.